Live Weather & Forecast

Weather in Decatur

Tennessee, United States · Real-time conditions & 3-day outlook

Flag of United States
Partly cloudy
21°C
Feels like 21°C
70°F / Feels 70°F
Partly cloudy
Decatur, Tennessee
🌞 Daytime
Updated: 2026-04-13 11:00
💧
Humidity
47%
💨
Wind
19.4 km/h SSW
🌬️
Wind Gust
22.4 km/h
🌡️
Pressure
1026 mb
👁️
Visibility
16 km
☀️
UV Index
4.8 (Moderate)
🌧️
Precipitation
0 mm
☁️
Cloud Cover
75%
💦
Dew Point
12.1°C
🌐
Wind Degree
208°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
137.9 μg/m³
NO₂
1.6 μg/m³
O₃
122 μg/m³
SO₂
2.3 μg/m³
PM 2.5
3.6 μg/m³
PM 10
4.4 μg/m³

Weather Alerts 2

Met · Severe · Expected
Red Flag Warning issued April 12 at 10:15PM EDT until April 13 at 8:00PM EDT by NWS Peachtree City GA

Default overview section The National Weather Service in Peachtree City has issued a Red Flag Warning for low relative humidities and gusty winds in portions of north Georgia, which is in effect from noon to 8 PM EDT Monday. Due to ongoing drought and lack of rainfall, critical fire weather conditions are reached at relative humidity values of 30% or less. * Affected Area...North Georgia includ...

This warning includes the Chattahoochee National Forests. A Red Flag Warning means that critical fire weather conditions are either occurring...or will occur within 24 hours. Please refer to the local burn permitting authorities on whether you may burn outdoors. If you do burn outside...use extreme...

Effective: 2026-04-12T22:15:00-04:00  ·  Expires: 2026-04-13T08:00:00-04:00
Met · Severe · Expected
Red Flag Warning issued April 13 at 4:41AM EDT until April 13 at 8:00PM EDT by NWS Peachtree City GA

Default overview section The National Weather Service in Peachtree City has issued a Red Flag Warning for low relative humidities and gusty winds in portions of north Georgia, which is in effect from noon to 8 PM EDT Monday. Due to ongoing drought and lack of rainfall, critical fire weather conditions are reached at relative humidity values of 30% or less. * Affected Area...North Georgia includi...

This warning includes the Chattahoochee National Forests. A Red Flag Warning means that critical fire weather conditions are either occurring...or will occur within 24 hours. Please refer to the local burn permitting authorities on whether you may burn outdoors. If you do burn outside...use extreme...

Effective: 2026-04-13T04:41:00-04:00  ·  Expires: 2026-04-13T20:00:00-04:00

Today's Hourly Forecast

24-hour breakdown for Decatur, Tennessee

12 AM
Clear
20°
Clear
💧 42% 💨 8.3 km/h
1 AM
Clear
19°
Clear
💧 45% 💨 10.4 km/h
2 AM
Clear
19°
Clear
💧 51% 💨 8.6 km/h
3 AM
Clear
18°
Clear
💧 50% 💨 9 km/h
4 AM
Clear
17°
Clear
💧 51% 💨 11.5 km/h
5 AM
Clear
17°
Clear
💧 52% 💨 11.2 km/h
6 AM
Clear
17°
Clear
💧 51% 💨 12.2 km/h
7 AM
Clear
18°
Clear
💧 54% 💨 10.4 km/h
8 AM
Sunny
19°
Sunny
💧 54% 💨 9.7 km/h
9 AM
Sunny
21°
Sunny
💧 52% 💨 11.5 km/h
10 AM
Sunny
23°
Sunny
💧 47% 💨 16.2 km/h
11 AM
Partly cloudy
21°
Partly cloudy
💧 47% 💨 19.4 km/h
12 PM
Sunny
26°
Sunny
💧 39% 💨 20.2 km/h
1 PM
Sunny
27°
Sunny
💧 37% 💨 20.5 km/h
2 PM
Sunny
28°
Sunny
💧 32% 💨 19.8 km/h
3 PM
Sunny
28°
Sunny
💧 29% 💨 19.1 km/h
4 PM
Sunny
27°
Sunny
💧 31% 💨 18.4 km/h
5 PM
Sunny
26°
Sunny
💧 31% 💨 17.3 km/h
6 PM
Sunny
25°
Sunny
💧 51% 💨 14.4 km/h
7 PM
Sunny
23°
Sunny
💧 57% 💨 11.5 km/h
8 PM
Partly Cloudy
22°
Partly Cloudy
💧 52% 💨 9 km/h
9 PM
Clear
21°
Clear
💧 53% 💨 7.9 km/h
10 PM
Clear
20°
Clear
💧 61% 💨 7.6 km/h
11 PM
Clear
20°
Clear
💧 59% 💨 8.6 km/h

3-Day Forecast

Daily overview for Decatur, Tennessee

Today
Sunny
Sunny
29° / 16°
🌧️ 0% chance of rain
💧 Avg. humidity: 47%
💨 Max wind: 20.5 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.8
🌅 Sunrise: 07:09 AM
🌇 Sunset: 08:11 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Sunny
Sunny
27° / 16°
🌧️ 0% chance of rain
💧 Avg. humidity: 61%
💨 Max wind: 16.6 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 2.1
🌅 Sunrise: 07:08 AM
🌇 Sunset: 08:11 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Sunny
Sunny
27° / 15°
🌧️ 0% chance of rain
💧 Avg. humidity: 53%
💨 Max wind: 17.6 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 2.4
🌅 Sunrise: 07:07 AM
🌇 Sunset: 08:12 PM
🌙 Waning Crescent
🌑 Moon: 8% lit

Best Time to Visit Decatur

Plan your trip to Decatur, United States around the most favorable weather conditions.

Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
← Back to Decatur 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Decatur?
Current conditions in Decatur: Partly cloudy, temperature 21°C, humidity 47%.
What is the best time to visit Decatur?
The best time to visit Decatur is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Decatur?
Decatur is located at approximately 35.5° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Decatur?
The wettest period in Decatur is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Decatur?
For visits to Decatur during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Decatur in?
Decatur is located in United States, in the state of Tennessee.
What are the public holidays in Decatur in 2026?
View the 2026 public holidays for Decatur on our Holidays page.
What are the GPS coordinates used for the weather forecast in Decatur?
The weather forecast for Decatur uses coordinates 35.5148, -84.7902.